ipcalc

calculates IP network information

TLDR

Calculate network info

$ ipcalc [192.168.1.0/24]

Show with netmask

$ ipcalc [192.168.1.0] [255.255.255.0]

Split network into subnets

$ ipcalc [192.168.0.0/16] -s [256] [256] [256]

Check if IP is in network

$ ipcalc -c [192.168.1.100] [192.168.1.0/24]

Show binary representation

$ ipcalc -b [192.168.1.0/24]

SYNOPSIS

ipcalc [options] address [netmask]

ipcalc calculates IP network information. It shows network address, broadcast address, host range, and other details from an IP address and netmask or CIDR notation.
The tool is essential for network planning, subnetting, and troubleshooting IP configuration issues.

PARAMETERS

address

IP address with optional CIDR.

netmask

Subnet mask (if not CIDR).

-b, --broadcast

Show broadcast address.

-n, --network

Show network address.

-h, --hostname

Show hostname.

-s size...

Split into subnets of size.

-c, --check

Validate address.

--class

Show address class.

--minaddr

Show minimum host address.

--maxaddr

Show maximum host address.

-4, -6

Force IPv4/IPv6.

OUTPUT EXAMPLE

$ Address:   192.168.1.0
Netmask:   255.255.255.0 = 24
Wildcard:  0.0.0.255
Network:   192.168.1.0/24
HostMin:   192.168.1.1
HostMax:   192.168.1.254
Broadcast: 192.168.1.255
Hosts:     254

CAVEATS

Different versions exist with varying features. Some features may not be available. IPv6 support varies by implementation.